Composition of the Air and the Greenhouse Effect | Activity Adapted for Libras

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⚠️ This adapted Natural Sciences activity was designed to make teaching Air Composition and the Greenhouse Effect more accessible to deaf students through visual resources in Brazilian Sign Language (Libras) and written Portuguese.

The material combines visual representations of Libras signs, scientific illustrations, molecular models, and graphs, supporting students' understanding of scientific concepts and creating more opportunities for participation in classroom activities.

Number of questions in the activity:

6 adapted questions + complete answer key, distributed across 3 activity pages.

The sequence explores air composition, the characteristics of major atmospheric gases, graph interpretation, the natural greenhouse effect, chemical formulas, and the influence of fuel combustion on the intensification of this phenomenon.

Target audience:

Suitable for Middle School and High School, especially for:

• Deaf students who use Brazilian Sign Language (Libras), including those learning written Portuguese as a second language.

• Deaf students with mild Intellectual Disabilities who need clear instructions and structured activities.

• Deaf students with difficulties interpreting scientific information and understanding abstract concepts who benefit from visual representations.

The material can also support Science, Chemistry, Physics, and Specialized Educational Support (AEE) teachers.

Visual representations of signs are supplementary resources and do not replace instruction or guidance in Libras provided by a fluent professional.

Format:

Ready-to-print PDF containing:

🔹 6 adapted questions and a complete answer key; 🔹 3 activity pages; 🔹 instructions and answer choices in written Portuguese with visual support in Libras; 🔹 molecular models and a chart showing atmospheric composition; 🔹 multiple-choice and matching activities; 🔹 contextualized scientific illustrations; 🔹 versions with standard lettering and UPPERCASE lettering; 🔹 black-and-white version; 🔹 BNCC-related skills.

⏱️ Save approximately 6 hours and 1 minute of preparation time! The material is already adapted, illustrated, formatted, and accompanied by a complete answer key, reducing the time needed to prepare resources that support linguistic and visual accessibility.

Content covered:

The activity develops six main areas of scientific knowledge:

1. Air composition: Recognizing air as a mixture of different gases.

2. Graph interpretation: Identifying the approximate proportions of nitrogen (78%), oxygen (21%), and other gases (1%) in dry air.

3. Characteristics of gases: Matching nitrogen, oxygen, and carbon dioxide to their characteristics.

4. Natural greenhouse effect: Understanding the importance of certain atmospheric gases in keeping the Earth warm.

5. Chemical formulas: Matching CO₂, CH₄, H₂O, and N₂O to the names of the corresponding substances.

6. Human activities and the greenhouse effect: Understanding the relationship between gasoline combustion, CO₂ emissions, and the intensification of the greenhouse effect.

Important information for teachers:

The activity organizes learning through a progressive conceptual sequence, beginning with more concrete information and gradually introducing scientific relationships.

In the first question, students observe different molecules and identify that air is composed of a mixture of gases. The visual representation helps introduce a concept that cannot be observed directly.

In the second question, students interpret a pie chart to recognize nitrogen as the most abundant gas in dry air. The activity also develops data interpretation and percentage comparison skills.

In the third question, students match nitrogen, oxygen, and carbon dioxide to their characteristics, connecting these gases to processes such as respiration and photosynthesis.

In the fourth question, an illustration of the Earth supports understanding of the natural greenhouse effect, showing that certain gases help keep the planet warm.

In the fifth question, students match the names of four gases to their chemical formulas, developing familiarity with scientific language without requiring them to write the formulas independently.

In the sixth question, an illustrated scene featuring vehicles helps students connect gasoline combustion to the release of CO₂ and the intensification of the greenhouse effect.

The main educational benefit lies in the integration of scientific content and linguistic accessibility: students encounter information in written Portuguese, accompanied by visual representations of Libras signs and scientific resources that support concept development.

Key features:

✅ Bilingual accessibility: Written Portuguese accompanied by visual representations of Brazilian Sign Language (Libras) signs.

✅ Progressive conceptual sequence: From recognizing atmospheric gases to understanding the greenhouse effect.

✅ Visual scientific support: Molecular models, graphs, and contextualized illustrations.

✅ Vocabulary development: Connections between signs, written words, and scientific concepts.

✅ Reduced writing demands: Students respond primarily through selecting answers and matching information.

✅ Practicality: Available in UPPERCASE and black-and-white versions, with a complete answer key.